python3 tkinter 实现凯撒密码GUI界面

Codes

import tkinter as tk
from tkinter import messagebox

class Kaisa():
    def __init__(self):  # 构造函数
        self.window = tk.Toplevel() #Toplevel 子窗口
        self.input = tk.StringVar()
        self.output = tk.StringVar()
        self.key = tk.StringVar()
        self.dzb = ""  # 对照表

    def set_window(self):
        self.window.title("凯撒密码")
        self.window.geometry('400x250')
        tk.Label(self.window, text="请输入明文/密文：").place(x=50, y=40)
        tk.Label(self.window, text="请输入位移数：").place(x=50, y=80)
        tk.Label(self.window, text="输出结果:").place(x=50, y=160)
        tk.Label(self.window, textvariable=self.output,bg='red').place(x=50, y=200)
        tk.Entry(self.window, textvariable=self.input).place(x=150, y=40)
        tk.Entry(self.window, textvariable=self.key,width=2).place(x=150, y=80)
        self.key.set(3)
        tk.Button(self.window, bg='lightgreen', activebackground='yellow',
                  text='加密', font=20, command=self.encode).place(x=80, y=120)
        tk.Button(self.window, bg='lightgreen', activebackground='yellow',
                  text='解密', font=20, command=self.decode).place(x=170, y=120)
        tk.Button(self.window, bg='yellow', activebackground='green',
                  text='确定', font=20, command=self.getdzb).place(x=200, y=80)
        self.window.mainloop()

    def getdzb(self):
        k = int(self.key.get())
        #print(k)
        if(k < 0 or k > 25):
            messagebox.showwarning(title='警告', message='密钥需要在0-25之间')
            return
        self.dzb = ""
        for i in range(0, 26):
            if i+k < 26:
                self.dzb += chr(i+k+97)
            else:
                self.dzb += chr(i+k+97-26)
        print(self.dzb)

    def encode(self):
        input = self.input.get()  # 局部变量
        input = input.lower()
        if not(input.isalpha()):  # 只由字母组成
            messagebox.showwarning(title='警告', message='你输入的明文不正确')
            return
        res = ""
        for ch in input:
            res += self.dzb[int(ord(ch))-97]  # 数值-97
        self.output.set(res)

    def decode(self):
        input = self.input.get()
        input = input.lower()
        if not(input.isalpha()):
            messagebox.showwarning(title='警告', message='你输入的密文不正确')
            return
        res = ""
        for ch in input:
            res += chr((self.dzb.find(ch))+97)
        self.output.set(res)

class Content():
    def __init__(self):
        self.window = tk.Tk() #Tk()顶级窗口+初始化
        
    def set_window(self):
        self.window.title("古典加密系列")
        self.window.geometry('600x400')
        tk.Button(self.window,text="凯撒密码",font=40,command=self.ks).place(x=140,y=100)
        #tk.Button(self.window,text="单码密码",font=40, command=self.dm).place(x=250,y=100)
        #tk.Button(self.window,text="乘法逆元对",font=40,command=self.Cf).place(x=360,y=100)
        #tk.Button(self.window,text="Hill加密",font=40,command=self.hill).place(x=140,y=210)
        #tk.Button(self.window,text="同余代换",font=40,command=self.Ty).place(x=250,y=210)
        #tk.Button(self.window,text="判断素数",font=40,command=self.sushu).place(x=360,y=210)
        self.window.mainloop()
        
    def ks(self):
        x = Kaisa()
        x.set_window()


if __name__ == '__main__':
    content = Content()
    content.set_window()